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Nickel 625 vs. G-CoCr28 Cobalt

Nickel 625 belongs to the nickel alloys classification, while G-CoCr28 cobalt belongs to the cobalt alloys. They have a modest 28% of their average alloy composition in common, which, by itself, doesn't mean much. There are 27 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is nickel 625 and the bottom bar is G-CoCr28 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 33 to 34
6.7
Fatigue Strength, MPa 240 to 320
130
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 79
83
Tensile Strength: Ultimate (UTS), MPa 790 to 910
560
Tensile Strength: Yield (Proof), MPa 320 to 450
260

Thermal Properties

Latent Heat of Fusion, J/g 330
320
Maximum Temperature: Mechanical, °C 980
1200
Melting Completion (Liquidus), °C 1350
1330
Melting Onset (Solidus), °C 1290
1270
Specific Heat Capacity, J/kg-K 440
470
Thermal Conductivity, W/m-K 11
8.5
Thermal Expansion, µm/m-K 13
14

Otherwise Unclassified Properties

Base Metal Price, % relative 80
100
Density, g/cm3 8.6
8.1
Embodied Carbon, kg CO2/kg material 14
6.2
Embodied Energy, MJ/kg 190
84
Embodied Water, L/kg 290
440

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 220 to 250
31
Resilience: Unit (Modulus of Resilience), kJ/m3 260 to 490
160
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 26 to 29
19
Strength to Weight: Bending, points 22 to 24
19
Thermal Diffusivity, mm2/s 2.9
2.2
Thermal Shock Resistance, points 22 to 25
14

Alloy Composition

Aluminum (Al), % 0 to 0.4
0
Carbon (C), % 0 to 0.1
0.050 to 0.25
Chromium (Cr), % 20 to 23
27 to 30
Cobalt (Co), % 0 to 1.0
48 to 52
Iron (Fe), % 0 to 5.0
9.7 to 24.5
Manganese (Mn), % 0 to 0.5
0 to 1.5
Molybdenum (Mo), % 8.0 to 10
0 to 0.5
Nickel (Ni), % 58 to 68.9
0 to 4.0
Niobium (Nb), % 3.2 to 4.2
0 to 0.5
Phosphorus (P), % 0 to 0.015
0 to 0.040
Silicon (Si), % 0 to 0.5
0.5 to 1.5
Sulfur (S), % 0 to 0.015
0 to 0.030
Titanium (Ti), % 0 to 0.4
0